SQL: Stored Procedures

Stored procedures are basically executable scripts you store in your database. You can then execute them as needed. Instead of discussing what they are, let’s just make one and see how it works.


We are going to create a stored procedure that returns an employee’s email address based on their first name.

I am using AdventureWorks2012 in MS SQL Server for this lesson. If you do not have either installed and would like to follow along, check out my first two SQL lessons to get up and running:

  1. MS SQL Server: Installation
  2. SQL: SELECT Statement

If you are already up and running, let’s consider the SQL Query below

SELECT p.[FirstName]
 FROM [Person].[Person] as p join [Person].[EmailAddress] as e
 on p.BusinessEntityID = e.BusinessEntityID
 where p.FirstName like 'Ken'

I am using two tables, Person and EmailAddress from the schema Person

From my query, I am asking for the FirstName, MiddleName, LastName, and EmailAddress for any employee with the first name Ken.

While this works, the problem is if someone asks you to look for people named Kevin tomorrow, you would have to create this query all over again. Or, we can build a Stored Procedure

Stored Procedure

Let’s create a stored procedure. In this example, we are going to use a variable. In SQL you must declare you variables.

Variables are designated in SQL with the @ symbol in front. So our first line of code below translates to: create procedure dbo.getemail (create a stored procedure name dbo.getemail)  – @name nvarchar(20) – (use a variable named @name which is a character variable limited to 20 characters)

as – (states the code following “as” will be the code executed by the stored procedure)

finally – note the where statement was altered to include the @name variable

create procedure dbo.getemail @name nvarchar(20)
SELECT p.[FirstName]
 FROM [Person].[Person] as p join [Person].[EmailAddress] as e
 on p.BusinessEntityID = e.BusinessEntityID
 where p.FirstName = @name

Once you execute the code above, your stored procedure can be found in your database


Execute the Stored Procedure

To execute – exec “procedure name” “variable” = “value”

exec dbo.getmail @name=’Kevin’


Now change the value of @name to ‘Mary’


Please Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s